mirror of
https://github.com/NVIDIA/OpenShell.git
synced 2026-10-19 05:50:41 +08:00
Philippe Martin
0a1f246587
* feat(sandbox,podman): trust corporate CA for https:// proxies and intercepted TLS The corporate proxy chaining only accepted plain http:// proxy URLs, so operators whose forward proxy terminates TLS with a private corporate CA had no way to reach it, and TLS-intercepting proxies (mitmproxy, squid ssl-bump) that re-sign tunneled server certificates broke every upstream handshake after CONNECT. The supervisor now accepts https:// proxy URLs: it wraps the connection to the proxy in TLS before the CONNECT handshake, verifying the proxy certificate against the built-in Mozilla roots, the system CA bundle, and an optional operator corporate CA bundle. The upstream dial returns a Plain/Tls stream enum consumed generically by the relay paths. The corporate CA is delivered as a driver-supplied command-line argument (--upstream-proxy-ca-bundle), never an environment variable, matching the hardened proxy-config model where a sandbox image cannot influence the operator's egress boundary. It is folded into the sandbox combined trust bundle (write_ca_files) and the L7 upstream verification store (build_upstream_client_config) at startup, so intercepted upstream handshakes succeed and sandbox workloads trust the re-signed certificates. Configuration is fail-closed: a CA bundle set without a proxy, or an unreadable or certificate-free file, is fatal rather than silently weakening the trust boundary. The shared parse_upstream_proxy_url validator accepts https:// (recording the scheme so the driver and supervisor agree), keeping the explicit-port requirement. The Podman driver gains a proxy_ca_bundle operator setting (TOML, --sandbox-proxy-ca-bundle, OPENSHELL_SANDBOX_PROXY_CA_BUNDLE) that bind-mounts the host PEM read-only into the sandbox (a CA certificate is not secret) and points --upstream-proxy-ca-bundle at it, with a create-time readability check. The standalone dev gateway task passes OPENSHELL_SANDBOX_PROXY_CA_BUNDLE through to the generated podman config, so a local gateway can be pointed at a TLS-intercepting proxy without hand-editing the regenerated TOML. Refs #1792 Signed-off-by: Philippe Martin <phmartin@redhat.com> * fix(sandbox): reject CA bundles with valid PEM framing but invalid X.509 DER The proxy CA bundle validation counted PEM blocks that base64-decoded successfully, but did not verify the decoded bytes were accepted as trust anchors by RootCertStore. A bundle with syntactically valid PEM framing but invalid DER would pass the startup check while contributing zero usable anchors, causing opaque TLS failures at runtime instead of a fail-closed startup error. Validate decoded certificates through RootCertStore::add_parsable_certificates and reject the bundle unless at least one is accepted. Signed-off-by: Philippe Martin <phmartin@redhat.com> * fix(sandbox,podman): allow proxy auth without insecure acknowledgement for https:// proxies For an https:// proxy the Proxy-Authorization credential travels inside the verified TLS session, so the proxy_auth_allow_insecure acknowledgement is unnecessary. Previously both http:// and https:// proxies required it, producing a misleading cleartext-risk diagnostic for a path that is already encrypted. Skip the requirement when the proxy URL uses https://; the acknowledgement is still tolerated if set. Updated in both the supervisor and Podman driver validation paths, with docs and tests. Signed-off-by: Philippe Martin <phmartin@redhat.com> * fix: format Signed-off-by: Philippe Martin <phmartin@redhat.com> * fix(kubernetes): use truly unsupported scheme in proxy validation test https:// is now a supported proxy scheme after a13c4dce, so the unsupported-scheme test must use a genuinely unsupported scheme. Signed-off-by: Philippe Martin <phmartin@redhat.com> * fix(e2e): sign the https proxy fixture listener cert with a CA The corporate-proxy E2E fixture served a single `openssl req -x509` certificate as its TLS listener identity. OpenSSL marks that certificate `basicConstraints: critical, CA:TRUE`, and rustls refuses a CA certificate presented as an end-entity certificate (CaUsedAsEndEntity). The supervisor's TLS handshake with the proxy therefore failed, the upstream dial errored, and the workload's CONNECT was dropped without a response, so podman_corporate_proxy_trusts_ca_bundle_for_https_proxy failed on the approved destination while policy denial still worked. Generate a corporate CA and a separate listener leaf signed by it, serve the leaf chain, and publish only the CA as the bundle the supervisor trusts. This is what an intercepting proxy actually presents, and it exercises the corporate-CA trust path rather than pinning the listener certificate itself. Refs #1792 Signed-off-by: Philippe Martin <phmartin@redhat.com> --------- Signed-off-by: Philippe Martin <phmartin@redhat.com>